基于电化学沉积的高深宽比无源MEMS惯性开关的研制

基于电化学沉积技术在金属基底上制作了一种新型的无源MEMS惯性开关。针对高深宽比、细线宽微电铸用光刻胶模具制作过程中,由于SU-8胶膜严重侧蚀导致的胶膜制作困难、质量低下的问题,进行了紫外光刻试验研究。试验研究了不同曝光剂量和后烘时间对SU-8胶光刻效果的影响,优化了光刻工艺参数。采用降低曝光剂量和延长后烘时间相结合的方法解决了高深宽比、细线宽SU-8胶膜制作困难的问题,制作出高质量的微电铸用光刻胶模具。最后,在上述试验结果基础上制作了一种高深宽比、无源MEMS惯性开关。其外形尺寸为3935μm×3935μm×234μm,其中最细线宽12μm,单层最大深宽比达10∶1,多层最大深宽比达20∶1。     

民机光触媒净化装置的光学设计

为有效去除民用飞机座舱中的挥发性有机化合物(volatile organic compounds,简称VOCs),对一种新型飞机管路式光触媒净化装置中的光学部件进行了设计、仿真与优化。该光学部件是将置于导光板端面的紫外发光二极管(ultraviolet light-emitting diode,简称UV-LED)点光源转换为导光板面光源,以获得净化装置中均匀的光照。受限于净化装置的构型,导光板需设计为两端入光的窄长型结构,而如何获得均匀的面光源出光性能成为一大难题。为了解决这一难题,对该光学部件进行了合理的光学设计,并予以仿真。进而根据仿真结果对导光板上的网点分布作出优化,并获得了较好的面光源出光性能。     

UVCS/SOHO Observations of H I Lyman Alpha Line Profiles in Coronal Holes at Heliocentric Heights Above 3.0 R⊙

The Ultraviolet Coronagraph Spectrometer (UVCS) on the Solar and Heliospheric Observatory (SOHO) has been used to measure spectral line profiles for H I Lyα in the south polar coronal hole at projected heliocentric heights from 3.5 to 6.0 R_⊙ during 1998 January 5–11. Observations from 1.5 to 2.5 R_⊙ were made for comparison. The H I Lyα profile is the only one observable with UVCS above 3.5 R_⊙ in coronal holes. Within this region the outflowing coronal plasma becomes nearly collisionless and the ionization balance is believed to become frozen. In this paper, the 1/e half widths of the coronal velocity distributions are provided for the observed heights. The velocity distributions include all motions contributing to the velocities along the line of sight (LOS). The observations have been corrected for instrumental effects and interplanetary H I Lyα. The half widths were found to increase with projected heliographic height from 1.5 to 2.5 R_⊙ and decrease with height from 3.5 to 5 R_⊙. This revised version was published online in June 2006 with corrections to the Cover Date.     

Ozone mini-hole observation over the Balkan Peninsula in March 2005

Areas with dimensions of 1000–3000 km in which the total ozone content (TOC) decreases fast are called ozone mini-holes. They are generated mainly dynamically in two ways, either by poor-ozone air mass transport from the tropics to higher latitudes by planetary wave activity or, they are connected with strong adiabatic uplifting of the tropopause height. An ozone mini-hole, generated by the second mechanism, was observed over the Balkan Peninsula on 19/21 March 2005. In the middle of March, the polar vortex was strongly disturbed by Rossby waves, reaching up to the lower stratosphere. Warming episodes over a geographical area, covering the Barents Sea and the Polar Sea north from Central Siberia, displaced a polar vortex fragment extremely southwards. However, the vorticity was weak and the stratospheric temperatures did not reach low values, providing conditions for ozone chemical destruction via heterogenic reactions. At the same time, a Rossby wave ridge was located below the European polar fragment. In the period from 13 to 19 March, the thermal tropopause over Sofia was uplifted almost by 3 km. Ozone distributions observed by the SCIAMACHY instrument on 18–21 March show a fast TOC decrease westwards from Ireland, which was moving eastwards during the next days, increasing the area in which the ozone content decreased. On 20/21 March low ozone content was observed above the Stara Zagora (42°N, 25°E) ground-based station by means of the GASCOD instrument, using DOAS technique. The TOMS Earth probe instrument detected 237 DU over Sofia. This is a record low March value from the beginning of the TOMS instrument measurements in 1978. In March/April the ozone distribution was characterized by its mean annual maximum of 360 DU at 42°N.     

UV光固化胶粘剂的研制

研制出了一种适用于高档家具玻璃、玻璃工艺器、水晶玻璃，光学玻璃等胶接用的丙烯酸系UV光固化胶粘剂，该胶粘接强度高、耐水性能好，玻璃接头在沸水中煮数十小时不剥离。     

O-star winds in the Magellanic Clouds and the Milky Way

UV P-Cygni profiles of OB-stars in the Magellanic Clouds (observed with HST), and the galaxy (observed with IUE) are analyzed empirically using a line formation procedure similar to the one described by Lamers et al. (1987). The assumption of a constant microturbulencev _turb throughout the wind is dropped and replaced by a radially increasing turbulence parameterv _turb(v), thus improving the fit for the emission peaks substantially, and at the same time avoiding the need for a justification of extremely supersonic turbulence in the vicinity of the wind's sonic point. The Sobolev optical depth is determined interatively at fixed velocities in the wind, which removes the bias introduced by the choice of a specific parameterization function. Where it was possible and necessary a full photospheric spectrum was used to illuminate the wind line. The terminal velocitiesv are are found to be largest in the Galaxy, smallest in the Small Magellanic Cloud, and intermediate or similar to galactic in the Large Cloud.     

基于导弹羽烟紫外辐射的日盲型探测器

日盲型紫外探测器件是紫外告警技术的关键技术。介绍了目标(导弹羽烟)与背景的紫外辐射特征,讨论了紫外探测器件发展及特点。     

环氧共混树脂的光固化及其表面化学反应

研究了双酚A型环氧树脂与有机硅环氧树脂紫外光辐照共混改性的工艺条件,并采用扫描电镜和X射线光电子能谱等分析手段对树脂改性效果和表面的物理和化学变化进行了研究.结果表明,采用二苯基碘鎓六氟磷酸盐为光引发剂,当质量分数为5％时,随着E-44含量的增加,共混树脂体系的光固化速度加快.当两者质量比为1∶ 2时,经15min的紫外光辐照后,共混树脂体系的凝胶率可达93％.X射线光电子能谱分析结果表明,在光固化的同时,试样的表面被紫外光辐照时产生的臭氧和原子氧部分氧化,转化为一层含C的氧化硅(SiO _{x )膜.}      

国外紫外空间探测器发展综述

文章首先介绍了紫外线的谱段范围和特点,然后从紫外天文、对行星和卫星的空间探测和人造地球卫星等三个方面的应用,阐述了国外近年来紫外探测器发展和具体用途.最后针对紫外独有的特点,提出中国在该领域可能的发展方向和应重点研究的方向.